"Installation failed since the device already has a newer version of this application" Black-box Robotium testing Android Studio

I have a black-box Robotium test working in Eclipse. I have imported the test into Android Studio. In the gradle file I've added: - Dependency to Robotium library: androidTestCompile 'com.jayway.android.robotium:robotium-solo:5.5.1'

• The package of the app under test in the attribute: testApplicationId "package.app.under.test"

When I run the test I get the Exception:

* "Installation failed since the device already has a newer version of this application. In order to proceed, you have to uninstall the existing application." *

I tried to uninstall the app, re-install, change the version of the app but I cannot run the test.

Does anyone know how to run a black-box Robotium test in Android Studio, for an app without the source code available? Is correct to add the package of the app under test in the testApplicationId attribute.